15 U.S.C. § 2822: Automotive fuel rating testing and disclosure requirements

determine the automotive fuel rating of any such fuel; and if such refiner distributes such fuel to any person other than the ultimate purchaser, certify, consistent with the determination made under paragraph (1), the automotive fuel rating of such fuel. the automotive fuel rating of such fuel certified to such distributor; or if such distributor elects (at such time and in such manner as the Federal Trade Commission may, by rule, prescribe), the automotive fuel rating of such fuel determined by such distributor. the automotive fuel rating of such automotive fuel certified to such retailer under subsection (a)(2) or (b); if such automotive fuel retailer elects (at such time and in such manner as the Federal Trade Commission may, by rule, prescribe), the automotive fuel rating of such automotive fuel determined by such retailer for such automotive fuel; or if such automotive fuel retailer is a refiner, the automotive fuel rating of such automotive fuel determined under subsection (a)(1). The Federal Trade Commission shall, by rule, prescribe requirements, applicable to any manufacturer of new motor vehicles, with respect to the display on each such motor vehicle (or representation in connection with the sale of each such motor vehicle) of the automotive fuel requirement of such motor vehicle. No person who distributes automotive fuel in commerce may make any representation respecting the antiknock characteristics of such fuel unless such representation fairly discloses the automotive fuel rating of such fuel consistent with such fuel’s automotive fuel rating as certified to or determined by such person under the foregoing provisions of this section. in the case of automotive fuel which consists of a blend of two or more quantities of automotive fuel of differing automotive fuel ratings, only if the rating certified, displayed, or represented by such person is the average of the automotive fuel ratings of such quantities, weighted by volume; or in the case of fuel which does not consist of such a blend, only if the automotive fuel rating such person certifies, displays, or represents is the same as the automotive fuel rating of such fuel certified to, or determined by, such person. to any representation (by display at the point of sale or by other means) of any characteristics of any automotive fuel other than its automotive fuel rating; or to the identification of automotive fuel at the point of sale (or elsewhere) by the trademark, trade name, or other identifying symbol or mark used in connection with the sale of such fuel. may be used as a fuel in all motor vehicles of the same class as that motor vehicle without knocking; or may be used as a fuel in such motor vehicle under all operating conditions without knocking. Sections 202(a)(1) [subsec. (a)(1) of this section] and 203(b) [ section 2823(b) of this title ] shall take effect on the first day of the first calendar month beginning more than 6 months after the date of the enactment of this Act [ June 19, 1978 ]. Subsections (a)(2), (b), (c), and (e) of section 202 [subsecs. (a)(2), (b), (c), and (e) of this section] shall take effect on the first day of the first calendar month beginning more than 9 months after such date of enactment [ June 19, 1978 ]. Rules under section 202(d) [subsec. (d) of this section] may not take effect earlier than the beginning of the first motor vehicle model year which begins more than 9 months after such date of enactment [ June 19, 1978 ].”